Hubs, switches, and routers are all computer networking devices with varying capabilities. Unfortunately, the terms are often misused.
Comparing your machine’s IP address to that reported by a website may result in a surprising difference. I’ll explain why that is and why it’s a good thing.
DHCP stands for Dynamic Host Configuration Protocol, and is how computers request and receive “dynamic” IP addresses as well as additional configuration information.
If there is a conflict with your IP address, it could result in only one of the machines on your network working at a time.